Doctor Doom will try to talk Peter into joining him because it'll be revealed that RDJ iron man has actually always been Dr Doom he just didn't know it, and then he transitions into doom to fix the world his way avengers be damned, civil war was just the start, he's taking control, but he loves Peter, and he wants Peter to be his right band, but he'll refuse, and it'll be Peter in the end who has to kill Tony Stark aka Dr. Doom. /theory